drm/nouveau: include drm/drm_edid.h only where needed

Including drm_edid.h from nouveau_connector.h causes the rebuild of 15
files when drm_edid.h is modified, while there are only a few files that
actually need to include drm_edid.h.

Cc: Karol Herbst <kherbst@redhat.com>
Cc: Lyude Paul <lyude@redhat.com>
Cc: Danilo Krummrich <dakr@redhat.com>
Cc: nouveau@lists.freedesktop.org
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Acked-by: Alex Deucher <alexander.deucher@amd.com>
Reviewed-by: Andi Shyti <andi.shyti@linux.intel.com>
Reviewed-by: Danilo Krummrich <dakr@redhat.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20240104201632.1100753-1-jani.nikula@intel.com